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By definition, a Baseball is "9 to 9.25 inches or 22.86 to 23.495 centimeters in circumference." That means that the diameter is between 2.864788975 and 2.944366447 inches or 7.276564 and 7.478691 centimeters (an average of 2.904577711 inches or 7.377627 centimeters).

The weight is defined as, "between 5 and 5.25 ounces or 141.747615625 and 148.8349964063 grams."

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โˆ™ 10y ago
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โˆ™ 14y ago

Under current Major League Baseball rules, a regulation baseball is 9 to 9.25 inches (22.9 to 23.5 cm) in circumference -- the equivalent of a diameter of 2.75 to 3 inches (6.99 to 7.62 cm) -- and it weighs 5 to 5.25 ounces (142 to 149 grams).

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Q: How big are baseballs?
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